
//动态时钟
showTime();
setInterval(showTime,1000);

function showTime(){
    var time = new Date();
    var year = time.getFullYear();
    var mon = time.getMonth()+1;
    var day = time.getDate();
    var h = time.getHours();
    var m = time.getMinutes();
    var s = time.getSeconds();
    var week = time.getDay();
    switch (week){
        case 0:week="日";
            break;
        case 1:week="一";
            break;
        case 2:week="二";
            break;
        case 3:week="三";
            break;
        case 4:week="四";
            break;
        case 5:week="五";
            break;
        case 6:week="六";
            break;
    }
    var str = year +"年"+totwo(mon)+"月"+totwo(day)+"日"+"&nbsp;"+totwo(h)+":"+totwo(m)+":"+totwo(s)+"&nbsp;"+"星期"+week;
    //取id="time"的元素，填充当前时间
	document.getElementById("time").innerHTML = str;
	//欢迎文字
	document.getElementById("welcome").innerHTML = h<=12 ? "上午好！" : "下午好！";
}

//不足两位填充0
function totwo(n){
	return n<=9 ? "0"+n : n;
}